This sounds like cool idea. Of course, being a Poor, Starving Liberal Arts Student, I can't really afford to fly anywhere. Driving to 'Frisco or Vegas could be an option.

Perhaps an alternative to just a single event on a single day could be several events occurring simultaneously; say, in 'Frisco, Toronto, DC, and some convenient place in the UK, all linked by a live video feed of some kind? That way, the events could be small enough to not require a large amount of preparation, and everybody could join in without breaking the bank with travel expenses.